Friction washer for securing a wire mesh screening onto the...

Details Friction washer for securing a wire mesh screening onto the... Friction washer for securing a wire mesh screening onto the...

E - Fixed Constructions

21

D

85/142

E21D 11/00 (2006.01) E21D 21/00 (2006.01)

Patent

CA 1244270

-8- Abstract of the Disclosure A friction washer fox securing a wire mesh screening on the protruding end of rock bolts inserted into the wall of a mine is disclosed. The friction washer has a central opening with teeth set into the inside diameter thereof and adapted to engage the end of the bolts. A plurality of upstanding tabs are located on one face of the friction washer and radially spaced from the center of the central opening at a distance substantially equal to half the outside diameter of a hollow tube so as to allow the tabs to fit over the end of the hollow tube for holding the washer during installation on the protruding end of the rock bolt.

487993

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